Computer Networking: Fundamentals for Absolute Beginners by Bell Alexander

Author:Bell, Alexander [Bell, Alexander]
Language: eng
Format: azw3, epub, pdf
Published: 2020-09-03T16:00:00+00:00

networks and the internet. Everything that is transmitted in modern networks is heavily encrypted and almost impossible to hack unless you have the proper authority to access it. However, there have been reports of data interception in networks that do not deploy the latest encryption protocols.

Sublayers

The presentation layer can be divided into two sublayers, Common Application Service Element (CASE) and Specific Application Service Element (SASE).

CASE

A lot of applications require the same services from the next layer in the OSI model, which is the session layer. This sublayer provides all such common services. One such service is the Association Control Service Element (ACSE) that enables different applications to communicate. It verifies the application identities and can also run authentication checks if needed.

SASE

As the name suggests, this sublayer fulfills services related to specific applications. Some of these services include File Transfer, Access and Manager (FTAM), Virtual Terminal (VT), and Remote Database Access (RDA).

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